Research published in April 2022 in The Lancet also found that . [169], Algeria detects 47 new cases; 29 cases from Algiers, 06 cases from Bjaa, 01 cases from Boura, 11 cases from Constantine, bringing the total of confirmed cases to 63 cases. The findings of this study demonstrated that among the 101 samples analyzed, infectious virus was detected in more than 9% of the SARS-CoV-2 Omicron variant-infected patients (total 10; eight symptomatic and two asymptomatic patients). [189], The BA2.75.2 subvariant is observed to evade from neutralising antibodies in epidemiological samples. An official website of the United States government. This suggested the probability of variations in the viral replication kinetics. Omicron appears to cause less severe disease than Delta. [190], On 9 January 2023 the European CDC said there was suggestive evidence the XBB.1.5 variant had a growth advantage; after becoming dominant in the USA, it might become dominant in Europe in the following months.[191]. United Arab Emirates announces its first cases. t.co/K6XSGcnn9h t.co/CjMFccNmwT", "Covid: 13 test positive for Omicron after S Africa-Netherlands flights", "Actuele informatie over COVID-19 | RIVM", "Travellers test positive to Omicron COVID-19 strain after arriving in Sydney from southern Africa, NSW Health says", "WATCH LIVE: President Ramaphosa to address the nation", "WATCH: President Cyril Ramaphosa addresses the nation | eNCA", "Family meeting: Ramaphosa to address nation at 8pm", "Cyril Ramaphosa to address the nation on new Covid-19 variant", "Closing the door to South Africa won't stop Omicron variant from spreading globally - Ramaphosa", "FULL ADDRESS | SA remains on alert level 1 lockdown", "Ramaphosa to address South Africa on Sunday evening", "SA stays on lockdown level 1 - Read President Cyril Ramaphosa's full speech", "Family meeting tonight What to expect from Ramaphosa's Omicron address", "[WATCH LIVE] Ramaphosa updates SA on Covid-19 measures (8 pm)", "South Africa dismayed at 'punishment' for honesty over Omicron coronavirus variant", "COVID-positive repatriation flight arrival to the Northern Territory tests positive to Omicron variant", "First Omicron cases confirmed in Spain, Sweden latest updates", "India announces vaccine support to Africa to fight Omicron", "Omicron Covid variant poses very high global risk, says WHO", "Omicron: entry bans spread as China pledges 1bn jabs for Africa", "California confirms nation's first Omicron variant coronavirus case", "Saudi Arabia detects first case of COVID-19 Omicron variant in Kingdom", "Covid news: Omicron detected in US; UK reports 48,374 new cases and 171 deaths as it happened", "Omicron Covid variant 'present in Europe at least 10 days ago', "Omicron Covid variant detected in Ireland from travel but 'no evidence yet' of community transmission", "Doctor who attended UK summit confirmed as Israel's 3rd Omicron case", "Israeli doctor believes he caught Omicron variant of Covid in London", "Omicron variant fuelling 'exponential' rise in Covid cases, say South Africa officials", "Covid live: Germany set to impose restrictions on the unvaccinated; India detects two cases of Omicron variant", "First case of Omicron variant case found in mainland France", "Iceland's First Case of Omicron Variant Confirmed", "Greece Reports First Case of Omicron Variant on Crete", "Finland discovers first case of Omicron variant of coronavirus", "Singapore detects first 2 imported Covid-19 cases who test preliminarily positive for Omicron", "Second US case of Omicron linked to New York anime convention", "All 53,000 attendees of Anime NYC urged to get tested after one got Omicron", "Statement from Mayor de Blasio on Omicron Variant", "Omicron: Biden tightens travel rules amid new Omicron cases", "Codid-19: un second cas de variant Omicron La Runion", "Omicron Variant Detected in at Least 10 U.S. States", "Covid news: Boris Johnson reported to police over No 10 parties, South Korea cases and deaths at new high", "Omicron outbreak at Norway Christmas party is biggest outside South Africa, authorities say", "Outbreak caused by the SARS-CoV-2 Omicron variant in Norway, November to December 2021", "Covid-19 pandemic: Israel confirms 7 cases of omicron, 27 others suspected", "New York Omicron cases rise to eight as official warns of community spread", "Two confirmed cases of Omicron variant in quarantine", "Weekly operational update on COVID-19 - 7 December 2021", "Queensland records first cases of the Omicron variant of COVID-19, both genetically different", "New omicron variant detected in 57 countries: WHO", "SARS-CoV-2 B.1.1.529 (Omicron) Variant United States, December 18, 2021", "Islamabad reports its first confirmed case of Omicron", "Omicron spreads to 57 countries but too early to tell if variant more infectious, WHO says", "Covid live: Australia to offer jabs to children aged five to 11; people in Scotland urged to cancel Christmas parties", "UK reports highest daily new cases since January as it happened", "Bangladesh confirms first two cases of Omicron variant of COVID-19", "New York Hits Covid-19 Case Record as Omicron Looms", "Australia Covid update: Omicron variant spreading rapidly as NSW and Victoria cases grow", "Cases of Omicron variant rise to 55 in Israel", "At least one person in UK has died with Omicron, says Boris Johnson", "U.K. Sees First Death of a Person With Omicron as Government Warns of Wave of Cases", "Covid live: Mainland China reports first Omicron cases; Norway to tighten restrictions", "Chinese mainland detects Omicron variant from imported asymptomatic carrier - People's Daily Online", "Salud confirma el primer caso de micron en Puerto Rico", "Pakistan's first Omicron case confirmed through gene-sequencing", "Covid live: France confirms 130 Omicron cases; South Korea has deadliest day of pandemic", "The Omicron Variant Can Evade Vaccine Protection. Clin Microbiol Infect. The isolation period for people testing positive for covid-19 was recently cut from 10 days to seven in England if two lateral flow tests returned negative results on days six and seven. The authors observed that samples from 20% to 30% symptomatic COVID-19 patients had an infectious virus. Active epidemiological investigation on SARS-CoV-2 infection caused by Omicron variant (Pango lineage B.1.1.529) in Japan: preliminary report on infectious period. Omicron's apparent shorter incubation period is important for a few reasons. Results: It evaluated not only the viral load determined by PCR testing, which can remain positive for some time beyond clinical recovery, but also the ability to cultivate viable virus from these people, meaning they were still clearly infectious. A surge team is being deployed. Benjamin Meyer, a virologist at the University of Geneva in Switzerland, says he too was stunned . [149], Omicron is in at least 115 countries. Meta-analysis shows phytosterol-fortified foods effectively lower LDL cholesterol levels. The SAR-CoV-2 RNA levels were significantly higher in nasopharyngeal and saliva samples with the infectious virus as compared to samples without the infectious virus. In one recent study, researchers found that people with Omicron infections were less likely to be hospitalized, end up in the I.C.U. https://www.news-medical.net/news/20220318/Duration-of-Omicron-variant-shedding-isolated-from-upper-respiratory-samples-collected-from-the-reported-case-patients-in-Japan.aspx. Please note that medical information found It will have some value for people in healthcare settings who are managing really ill people, but were getting to the pointprobably soon, if were not there alreadywhere the value will be less, he said. Epub 2020 Oct 6. Preliminary data from the National Institute of Infectious Diseaseswhich conducts disease surveillance in Japansuggest that the amount of viral RNA is highest three to six days after diagnosis or symptom onset.1. This timeline of the SARS-CoV-2 Omicron variant (November 2021 - February 2022) is a dynamic list, and as such may never satisfy criteria of completeness. Scientists are now trying to model Omicron's global trajectory, which depends on two factors. Covid booster jabs protect against Omicron and offer the best chance to get through the pandemic, health officials have repeatedly said. Dutch government warns there will likely be more. As of December 2, Botswana and South Africa have reported 19 and 172 Omicron variant cases, respectively, accounting for 62% of global cases. Malaysia has confirmed 11 new cases of the Omicron variant, all resulting from overseas travel. But only Covid isolation has a strict number of days indoors and with no contact with other people that you must adhere to. technical support for your product directly (links go to external sites): Thank you for your interest in spreading the word about The BMJ. News-Medical. President Macron warned that the following weeks would be "very difficult". More info. [116] [84], The Omicron variant features as such for the first time in the overview of WHO's weekly operational update, namely "Supporting Omicron variant detection and COVID-19 response in southern Africa." The review showed a low viral load in the first couple of days, but then a peak around days three to six, tailing off at days seven to nine until no viable virus could be recovered by day ten. [124], Qatar reports its first four cases, imported from abroad. He was undertaking mandatory isolation in the Howard Springs quarantine facility in the Northern Territory. Disclaimer. [162], French Health officials acknowledged the Omicron variant as the country most dominant variant. - WSJ Podcasts", "Palestinians detect first 3 cases of omicron in West Bank", "Covid-19: Three more Omicron cases reported in MIQ", "Biden warns of 'winter of severe illness and death' for those unvaccinated against Covid", "Omicron spreading rapidly in U.S., infections could peak in January, CDC warns", "Omicron Variant's Rapid Spread Triggers New Precautions", "Covid live: UK reports 93,045 new cases; pubs and restaurants in Ireland reportedly set to get 8pm curfew", "Covid-19: Qatar reports its first four Omicron cases", "WHO says Omicron in 89 countries and spreading rapidly", "Covid live: Omicron spreads significantly faster than Delta, says WHO; experts call for stricter restrictions in England 'very soon', "Cases of COVID-19 Omicron variant climb to 134 in Israel", "Dr Noor Hisham: 11 more Omicron variant cases detected", "Covid-19 update: 39 community cases in New Zealand today, 4 new cases of Omicron", "The Omicron variant has spread rapidly across the capital. Trending Now: "That basically tells us it's inherently more transmissible," said Mge evik, a clinical lecturer in infectious diseases and medical virology at the University of St . Whether changes in duration of infection are a result of variant characteristics or the public's vaccination status is unclear. The BCG vaccine does not decrease the risk of COVID-19 in healthcare workers, Novel self-amplifying RNA vaccine confers durable protection against COVID-19, reduces viral shedding in primate study, Protein OCLN found to play crucial role in SARS-CoV-2 cell-to-cell transmission. 2022 May. Studies suggest that Omicron infections can last in the body for up to 10 days. [184], The Pasteur Institute of Algeria (IPA) announced that it had recorded a total of 400 cases of the Omicron variant in Algeria, which represents 57% of the circulating variants. Duration of Omicron variant shedding isolated from upper respiratory samples collected from the reported case-patients in Japan. [29], Two Danish returnees from South Africa test positive,[30] and another two people with recent travel in Nigeria test positive in Ottawa, Canada. Furthermore, please note that some events may only be fully understood and/or discovered in retrospect. Cureus. Railroads in Europe were also affected, albeit not to the same extent. This question is for testing whether or not you are a human visitor and to prevent automated spam submissions. Estimates for this exposure-to-symptom gap, called the incubation period, clocked in at about five days for Alpha and four days for Delta. Objectives: Published by Elsevier Ltd. All rights reserved. A string of hugely positive studies show Omicron IS milder than other strains, with the first official UK report revealing the risk of hospitalisation is 50 to 70 per cent lower than with Delta. NOTE: We only request your email address so that the person you are recommending the page to knows that you wanted them to see it, and that it is not junk mail. (accessed May 01, 2023). Again, everyone is different and will experience their own early symptoms, but these seem to be among the group reported be most patients. However, despite all these stages, you may miss them all together and just test positive when doing the lateral flows we should all be taking regularly. Generally people are feeling like they have a bad cold with Omicron, and tend to bounce back within the seven days of isolation, although may be feeling tired for a week to follow. )[120] Epub 2022 Nov 8. [145], Airlines cancel more than 600 flights Christmas Eve, and hundreds on Christmas, due to severe staffing shortages. United Airlines cancels 185 of its mainline flights, 10% of its schedule, and Deutsche Lufthansa AG's robust holiday contingency plans were overwhelmed by the unexpected rise in sick leave. These cases were had arrived in Auckland from Dubai on December 11 and traveled to a managed isolation and quarantine in Rotorua on a bus chartered for international arrivals. The .gov means its official. A string ofhugely positive studiesshow Omicron IS milder than other strains, with the first official UK report revealing the risk of hospitalisation is50 to 70 per cent lower than with Delta. with these terms and conditions. When boarding a plane and entering Switzerland, all persons travelling from the UK must present a negative COVID-19 test and quarantine for 10 days. Epub 2022 Nov 25. From Monday, January 17, people in England will be able to leave isolation after two negative lateral flow tests (taken 24 hours apart) from day five. The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News Medical. As it is, the variant is projected to become the dominant strain within a week. [152], Algeria reports 12 new cases; 6 Algerian citizens and 2 nationals returning from France, 1 Briton and 3 Mauritanians. A more recent preprint from Japan (a study that is yet to be published in a scientific journal) looked at viral shedding attributed to omicron. PMID: 35027360 DOI: 10.1136/bmj.o89 No abstract available . China's leader Xi Jinping pledges 30m doses of its own vaccine to Africa by way of addressing global vaccine inequity, with 400m to follow (produced by Chinese-owned companies in Africa). Both people had landed in Sydney the previous day, and had traveled from southern Africa to Sydney via Doha, Qatar. Instead, the greater impact certainly in the UK appears to be absenteeism resulting in many essential services struggling to function. The study reflected the findings of the systematic . In other words, the data supported a ten-day isolation period. The variant is now in 89 counties, and its severity profile remains unknown. In the United States, 80% of the COVID-19 cases in the. Her academic background is in Pharmacy; she has a Bachelors in Pharmacy, a Masters in Pharmacy (Pharmacology), and Ph.D. in Pharmacology from Banasthali Vidyapith, Rajasthan, India. Here's How We Know", "Covid-19: dtection d'un premier cas du variant Omicron en Algrie", "Omicron spread in Israel may be wider than thought report", "Mainland reports 2 Omicron cases as supply chain threatened - People's Daily Online", "Omicron variant identified in 89 countries; has doubling time between 1.5-3 days in high community transmission areas: WHO", "First Omicron case detected in New Zealand", "Pasien Pertama Omicron di RI Kini Sudah Negatif, Begini Kronologinya", "Covid live: Italy reports highest daily cases since March; Canada's Omicron cases 'could overwhelm Ontario ICUs', "Omicron found in nearly all of Florida county's wastewater samples", "Dr. Anthony Fauci on Omicron and the Covid-19 Stalemate - the Journal. Both cases were linked to travel from mainland Africa. [113], Fifteen people are hospitalized in the UK. eCollection 2022. [173] In the U.S. 98% of COVID-19 cases the week prior were of the Omicron variant. A woman who recently traveled from South Africa becomes both New Jersey and Georgia's first confirmed case. Retrieved on May 01, 2023 from https://www.news-medical.net/news/20220318/Duration-of-Omicron-variant-shedding-isolated-from-upper-respiratory-samples-collected-from-the-reported-case-patients-in-Japan.aspx. [104] In England 20 cases are in hospital. [122] In Denmark it accounts for one-fifth of all cases,[123] and in Ireland 35%. Methods: Moreover, the assay results for virus isolation and infectivity depend on the sample collection procedure, storage conditions, and duration. Paul, Sangeeta. 2023 Feb 27;38(8):e59. 2022 Jan 13;376:o89. A new study conducted by Japanese researchers has shown that peak viral loads in people infected with omicron occur between 3 to 6 days after the onset of symptoms. The 18 case-patients studied were SARS-CoV-2 vaccinated, at least more than 14 days before COVID-19 diagnosis. Takahash K, Ishikane M, Ujiie M, Iwamoto N, Okumura N, Sato T, et al. Comparison of Nasopharyngeal and Saliva Swab Nucleic Acid Amplification and Rapid Antigen Testing To Detect Omicron SARS-CoV-2 Variant of Concern: a Prospective Clinical Trial (OMICRON). The study reflected the findings of the systematic . In Japan, people infected with SARS-CoV-2 are admitted to hospital under the Infectious Diseases Control Law or the Quarantine Act and released only after two consecutive negative tests by nucleic acid amplification or antigen quantification methods. The study reflected the findings of the systematic review, showing that viral shedding is highest at three to six days after the start of symptoms. The site is secure. An exploration of the pathophysiological factors and abnormalities of coagulation of long-COVID, High-protein diet counters adaptive thermogenesis in prediabetic individuals. doi: 10.3346/jkms.2023.38.e59. between patient and physician/doctor and the medical advice they may provide. eCollection 2022 Dec. Front Public Health. Patients who have been vaccinated twice were no longer required two successive COVID-19-negative test results after ten days of the diagnosis of COVID-19 or onset of symptoms. [99] China reports its first case (a returnee from overseas),[100] in Tianjin. Japan. The PubMed wordmark and PubMed logo are registered trademarks of the U.S. Department of Health and Human Services (HHS). Vsledek jejho testu oekvme, je te v izolaci a trasuj se vechny kontakty", "2 cases of Omicron variant detected in the UK, health secretary says", "Boris Johnson tightens rules on travel and mask-wearing over Omicron concerns", "UPDATE - The UK has been added to Switzerland's risk country list. The reduction of the isolation period to five days runs the risk of releasing infected people back into the community at their peak time for dissemination of infectious virus. [37], Two cases were detected in Sydney, Australia. The mean age of the population was 34 years (range, 23 to 54) and 78% (43/55) were female. To see how transmissible or contagious the Omicron variant is, it's helpful to look at the timeline of the spread of the disease: The variantthen known as B.1.1.529was reported to the World . [78], Eight cases of community transmission, unrelated to each other, are reported in New York. A similar trend was seen for positive virus detected in respiratory samples, with no infectious virus detected in samples after 10 days since diagnosis or symptom onset. [167], WHO announces that Omicron should not be described as "mild" given that the sheer scale of serious infections requiring hospitalization is overwhelming health systems worldwide. [43][44] Secondly, he called for the country to vaccinate. Puerto Rico confirms its first case,[102] as does Pakistan. [105], Algeria reports its first case, a foreign national who entered Algeria on December 10 and tested positive at the Algiers International Airport. Maryland has its first three cases, and Pennsylvania and Missouri one each. Because many COVID-19 tests can only detect COVID-19 . Covid booster jabs protect against Omicron and offer the best chance to get through the pandemic, health officials have repeatedly said. Now, Health Secretary Sajid Javid has announced that the self-isolation period for people who test positive for COVID is being cut to five full days in England (it is unclear, at this point, if other UK nations will do the same). on this website is designed to support, not to replace the relationship Viral culture positivity, negativity, and cycle threshold values of SARS-CoV-2 RT-PCR positive samples on 5, 7, 10, and 14days after the onset of symptoms. If Covid becomes an endemic . National Institute of Infectious Diseases. 2022 Dec 14;14(12):e32523. Pan, kter byla testovan na novou mutaci, NEBYLA v Egypt, ale na pobytu v Namibii a letla zpt do R pes JAR a Dubaj. Emerg Infect Dis. 2022. CDC estimates that Omicron accounts for 73% of COVID-19 cases in the U.S., up from 3% the week prior. [157], The second case of the Omicron variant has been confirmed in North Macedonia, in the town of Struga. No epidemiologic data was available about the secondary infections that occurred from patients with infectious viruses. 2021. The mutation profile gives us concern, but now we need to do the work to understand the significance of this variant and what it means for the response to the pandemic." BMJ. As a medical microbiologist, I am concerned that there is little scientific evidence to justify the safety of these reduced measures. Spain and Sweden report their first cases, the latter from a sample taken less than a week prior from a traveler from South Africa. Concerns that these discharge criteria may lead to prolonged hospital stays led the National Institute of Infectious Diseases to examine the duration of virus shedding to determine the period of potential infectiousness for patients with omicron. [70] The U.S. reports its second case (and its first case of community transmission) in a Minnesota resident who in late November had attended an anime convention in New York City, Anime NYC 2021; vaccination had been required for attendance. Sally Cutler does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment. Discussion: Furthermore, please note that some events may only be fully understood and/or discovered in retrospect. The extensive mutations of its spike proteins make for the Omicron variant. A third case is detected in the UK, but the individual concerned, who had traveled from southern Africa, is no longer in the country, instigating high-level contact tracing. Staff absences because of isolation have caused severe workforce shortages for critical services, including the NHS, schools, and transport, leading to calls for the UK to follow the US and cut the isolation period to five days. [174], Algeria detects 82 new cases; 61 cases from Algiers, 11 cases from Blida, 5 cases in Boura, 3 cases from Hassi Messaoud and 1 case in Ain Defla and Laghouat, bringing the total of confirmed cases to 145 cases. Israel reports 20 new cases, bringing the total number of Omicron cases to 55. WHO reports that given community transmission the number of cases doubles every 1.5 to three days. [68] Finland reports its first case, an individual who had traveled from Sweden with a group. 2023 Apr 19;14(4):276. doi: 10.1038/s41419-023-05791-3. and transmitted securely. An approach to lifting self-isolation for health care workers with prolonged shedding of SARS-CoV-2 RNA. [75] There are now ten cases in the U.S., in California, Colorado, Minnesota, and New York, and in Hawaii, where the person had no recent travel history. HHS Vulnerability Disclosure, Help From nanoparticle-based enrichment to mass spec refinements, they explore how these tools facilitate unbiased, deep, and rapid proteomics. This article is made freely available for personal use in accordance with BMJ's website terms and conditions for the duration of the covid-19 pandemic or until otherwise determined by BMJ. Lee E, Park S, Choi JP, Kim MK, Yang E, Ham SY, Lee S, Lee B, Yang JS, Park BK, Kim DS, Lee SY, Lee JY, Jang HC, Jeon J, Park SW. J Korean Med Sci. I strongly urge our policymakers to look at the scientific data and draw a sensible, informed, correct conclusion. Kritikos A, Caruana G, Lazor-Blanchet C, Currat M, Chiche JD, Vollenweider P, Bart PA, Opota O, Greub G. Microbiol Spectr. Plasma metabolomic characterization of SARS-CoV-2 Omicron infection. [148] Also, the confirmed first case in Islamabad, the capital of Pakistan, is reported. doi: 10.1136/bmj.o89. According to the CDC, the Omicron variant spreads more easily than the original SARS-CoV-2 virus and the Delta variant. [87] By this date, the CDC later confirms (on December 17) that 22 states of the U.S. have cases. FOIA [25][26], The first two cases in the United Kingdom are announced. To characterize how variant and vaccination status impact . [65] This is the first case in mainland France. [118], In the U.S. modeling by the CDC presented to state health leaders projects that Omicron will peak in January 2022, the case load having increased seven-fold in one week. The latest results could mean that "the virus establishes a very local infection in the upper airways and has less chance to go and wreak havoc in the lungs", which might make it easier "to hitch a ride on material expelled from the nose and mouth, allowing the virus to find new hosts". [108], New Zealand confirmed its first case of the Omicron variant, an individual who arrived in Auckland from Germany via Dubai on December 10. We use cookies to enhance your experience. By continuing to browse this site you agree to our use of cookies. [114], Despite there being few confirmed cases, wastewater samples in Orange County, Florida test nearly 100% for Omicron. [106], Israel has confirmed a total of 67 Omicron cases. doi: 10.1128/spectrum.03923-22. We showed that among the SARS-CoV-2 Omicron variant infected patients, viral shedding continues for 10 days in 13.5% of all cases and 11% in symptom-free cases. Centers for Disease Control and Prevention . [168] Britain deploys 200 military personnel to assist London hospitals, including 20 doctors. The decision for cessation of isolation according to the presence of symptoms could be reconsidered until further studies disapprove of our results. Stage one is contact with an infected person. Few studies have reported the clinical course and virus shedding duration in Omicron-infected patients based on quantification cycle (Cq) values. Meanwhile, the infected HCWs who give care to high-risk patients for severe COVID-19 might extend their isolations 10 days after the onset of symptoms, regardless of their symptoms. Previous studies suggest that the peak transmission period for people with other variants was between two days before symptoms emerged and three days afterward, with virus shedding peaking on or before symptom onset.2 The Japanese study suggests that with omicron, the peak of virus shedding may be two or three days later, Hunter said. [147], Portugal announces that on 22 December Omicron had become the dominant strain, accounting for 65.5% of cases, and Malaysia detects its first case. Mutation data from, Timeline of the SARS-CoV-2 Omicron variant, Network for Genomic Surveillance South Africa, "Classification of Omicron (B.1.1.529): SARS-CoV-2 Variant of Concern", "Structure, Function, and Antigenicity of the SARS-CoV-2 Spike Glycoprotein", "Inside SA leg of Omicron variant discovery: A single test result, a missing gene, and an email", "Omicron becomes dominant variant in South Africa", "SARS-CoV-2 Sequencing Update 1 December 2021", "Heavily mutated coronavirus variant puts scientists on alert", "COVID-19: How the spread of Omicron went from patient zero to all around the globe", "Omicron: How dangerous is the new variant first found in South Africa?

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